Mail Not Being Routed Extrenally

Our client currently has a setup where their default exchange domain name is
'Fitzsimons.co.uk'. All mail to this domain forwards to an exchange server.
This server then forwards mail for remote offices to pop mailboxes for the
remote email servers to collect. These 2 remote servers have independent
domain names of 'fitz-glas.demon.co.uk' and 'fitz-lond.demon.co.uk',
respectively. These servers collect mail fine, but upon sending mail back to
an external user '@fitzsimons.co.uk', it tries to route the mail internally.
The Internet connection wizard has been ran, ensuring internal  exchange
domain names for the remote server is correct but this hasn't helped. The
remote server is running SBS2003. Any help in resolving this matter would be
gratefully appreciated.
exedosAsked:
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SembeeCommented:
How are you forwarding email from Exchange to these two outside mail addresses?

The ideal solution would be for all the users to collect their email from the Exchange server. Any other solution is going to be cludge that requires administrative overhead.

You will need to create mail-enabled contacts for all the users who have accounts on the other two domains.
This contact will need to contact two email addresses:

username@fitzsimons.co.uk
username@fitz-glas.demon.co.uk (or the other one as applicable).

Exchange will then accept the messages that are sent to the first address and automatically send them back out to the second address.

Simon.
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Windows Server 2003

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